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  • Title: Sex Differences in Cardiovascular Effectiveness of Newer Glucose-Lowering Drugs Added to Metformin in Type 2 Diabetes Mellitus.
    Author: Raparelli V, Elharram M, Moura CS, Abrahamowicz M, Bernatsky S, Behlouli H, Pilote L.
    Journal: J Am Heart Assoc; 2020 Jan 07; 9(1):e012940. PubMed ID: 31902326.
    Abstract:
    Background Randomized controlled trials showed that newer glucose-lowering agents are cardioprotective, but most participants were men. It is unknown whether benefits are similar in women. Methods and Results Among adults with type 2 diabetes mellitus not controlled with metformin with no prior use of insulin, we assessed for sex differences in the cardiovascular effectiveness and safety of sodium-glucose-like transport-2 inhibitors (SGLT-2i), glucagon-like peptide-1 receptor agonists (GLP-1RA), dipeptidyl peptidase-4 inhibitors, initiated as second-line agents relative to sulfonylureas (reference-group). We studied type 2 diabetes mellitus American adults with newly dispensed sulfonylureas, SGLT-2i, GLP-1RA, or dipeptidyl peptidase-4 inhibitors (Marketscan-Database: 2011-2017). We used multivariable Cox proportional hazards models with time-varying exposure to compare time to first nonfatal cardiovascular event (myocardial infarction/unstable angina, stroke, and heart failure), and safety outcomes between drugs users, and tested for sex-drug interactions. Among 167 254 type 2 diabetes mellitus metformin users (46% women, median age 59 years, at low cardiovascular risk), during a median 4.5-year follow-up, cardiovascular events incidence was lower in women than men (14.7 versus 16.7 per 1000-person-year). Compared with sulfonylureas, hazard ratios (HRs) for cardiovascular events were lower with GLP-1RA (adjusted HR-women: 0.57, 95% CI: 0.48-0.68; aHR-men: 0.82, 0.71-0.95), dipeptidyl peptidase-4 inhibitors (aHR-women: 0.83, 0.77-0.89; aHR-men: 0.85, 0.79-0.91) and SGLT-2i (aHR-women: 0.58, 0.46-0.74; aHR-men: 0.69, 0.57-0.83). A sex-by-drug interaction was statistically significant only for GLP-1RA (P=0.002), suggesting greater cardiovascular effectiveness in women. Compared with sulfonylureas, risks of adverse events were similarly lower in both sexes for GLP-1RA (aHR-women: 0.81, 0.73-0.89; aHR-men: 0.80, 0.71-0.89), dipeptidyl peptidase-4 inhibitors (aHR-women: 0.82, 0.78-0.87; aHR-men: 0.83, 0.78-0.87) and SGLT-2i (aHR-women: 0.68, 0.59-0.78; aHR-men: 0.67, 0.59-0.78) (all sex-drug interactions for adverse events P>0.05). Conclusions Newer glucose-lowering drugs were associated with lower risk of cardiovascular events than sulfonylureas, with greater effectiveness of GLP-1RA in women than men. Overall, they appeared safe, with a better safety profile for SGLT-2i than for GLP-1RA regardless of sex.
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